Discovery of Imidazo[1,5-c]imidazol-3-ones: Weakly Basic, Orally Active Factor Xa Inhibitors
摘要:
The coagulation enzyme factor Xa (FXa) has been recognized as a promising target for the development of new antithrombotic agents. We previously found compound I to be an orally bioavailable FXa inhibitor in fasted monkeys; however, I showed poor bioavailability in rats and fed monkeys. To work out the pharmacokinetic problems, we focused our synthetic efforts on the chemical conversion of the 4-(imidazo[1,2-a]pyridin-5-yl)piperazine moiety of 1 to imidazolylpiperidine derivatives (fused and nonfused), which resulted in the discovery of the weakly basic imidazo[1,5-c]imidazol-3-one 3q as a potent and selective FXa inhibitor. Compound 3q showed favorable oral bioavailability in rats and monkeys under both fasted and fed conditions and antithrombotic efficacy in a rat model of venous thrombosis after oral administration, without a significant increase in bleeding time (unlike warfarin). On the basis of these promising properties, compound 3q was selected for further evaluation.
Urea derivative, process for producing the same, and use
申请人:Kubo Keiji
公开号:US20070093501A1
公开(公告)日:2007-04-26
The present invention provides a urea derivative or a salt thereof, which is useful as a therapeutic agent for thrombosis. The derivative is represented by Formula (I):
wherein Cy is an aromatic hydrocarbon group which may be substituted or an aromatic heterocyclic group which may be substituted; R
1
is a hydrogen atom or a hydrocarbon group which may be substituted; V is —C(O)—, —S(O)—, or —S(O)
2
—; W is —N(R
2
)—, —O—, or a bond (wherein R
2
is a hydrogen atom or a hydrocarbon group which may be substituted); X is alkylene which may be substituted; Y is —C(O)—, —S(O)—, or —S(O)
2
—; Z is a bond, a chain hydrocarbon group which may be substituted, or —N═; ring A is a non-aromatic nitrogen-containing heterocyclic ring which may be substituted; ring B is a nitrogen-containing heterocyclic ring which may be substituted; and
[Chemical formula 2]
,
are each independently a single bond or a double bond; provided that R
1
may be bonded to R
2
to form a non-aromatic nitrogen-containing heterocyclic ring and that R
2
may be bonded to a substituent of X to form a non-aromatic nitrogen-containing heterocyclic ring which may be substituted.
UREA DERIVATIVE, PROCESS FOR PRODUCING THE SAME, AND USE
申请人:Takeda Pharmaceutical Company Limited
公开号:EP1695961A1
公开(公告)日:2006-08-30
The present invention provides a urea derivative or a salt thereof, which is useful as a therapeutic agent for thrombosis. The derivative is represented by Formula (I):
[Chemical formula I]
wherein Cy is an aromatic hydrocarbon group which may be substituted or an aromatic heterocyclic group which may be substituted; R1 is a hydrogen atom or a hydrocarbon group which may be substituted; V is -C(O)-, -S(O)-, or -S(O)2-; W is -N(R2)-, -O-, or a bond (wherein R2 is a hydrogen atom or a hydrocarbon group which may be substituted); X is alkylene which may be substituted; Y is -C(O)-, -S(O)-, or -S(O)2-; Z is a bond, a chain hydrocarbon group which may be substituted, or -N=; ring A is a non-aromatic nitrogen-containing heterocyclic ring which may be substituted; ring B is a nitrogen-containing heterocyclic ring which may be substituted; and
[Chemical formula 2]
------‾ , ------̲
are each independently a single bond or a double bond; provided that R1 may be bonded to R2 to form a non-aromatic nitrogen-containing heterocyclic ring and that R2 may be bonded to a substituent of X to form a non-aromatic nitrogen-containing heterocyclic ring which may be substituted.
The coagulation enzyme factor Xa (FXa) has been recognized as a promising target for the development of new antithrombotic agents. We previously found compound I to be an orally bioavailable FXa inhibitor in fasted monkeys; however, I showed poor bioavailability in rats and fed monkeys. To work out the pharmacokinetic problems, we focused our synthetic efforts on the chemical conversion of the 4-(imidazo[1,2-a]pyridin-5-yl)piperazine moiety of 1 to imidazolylpiperidine derivatives (fused and nonfused), which resulted in the discovery of the weakly basic imidazo[1,5-c]imidazol-3-one 3q as a potent and selective FXa inhibitor. Compound 3q showed favorable oral bioavailability in rats and monkeys under both fasted and fed conditions and antithrombotic efficacy in a rat model of venous thrombosis after oral administration, without a significant increase in bleeding time (unlike warfarin). On the basis of these promising properties, compound 3q was selected for further evaluation.